Mine ventilator



E. C. CONDIT.

MINE VENTILATOR.

APPLICATION HLED APR.4,1921.

Patented Jan. 31, 1922.

,4 9. u 1 m mu rice.

EZEKIEL c. connlr, or SILVERTON, COLORADO.

MINE VENTILATOR.

. Application filed April 4.,

To all whom it may concern.

Be it known that I, EZEKIEL C. CoNorr, a citizen of the United States, residing at Silverton, in the county of San Juan and State of Colorado, have invented certain new and useful Improvements in Mine Ventilators, of which the followingjis a specification.

The present invention relates to mine ventilating apparatus and'more particularly to a specially constructed furnace, or stove, having a combustion chamber through which passes the ventilator duct for removing dust and noxious gases from the tunnels, shafts and other parts of a mine. The ventilator duct and the gases within the same at this point are thus brought to a high temperature before passing out to the atmosphere, thereby creating a draft in the duct. The furnace will also serve as a means for. heating the room or building in which the ventilator is located.

An importantfeature of the invention is the arrangement of the ducts, fiues andother parts of the ventilator, so that the gases from the ventilator duct and the products of combustion from the combustion chamber are discharged into a common up-take before passing to the atmosphere. The draft in the ventilator duct is considerably increased in this manner, thereby assuring efiicient ventilation of the mine. A fan-located in the uptake of the ventilator also serves as I a means for inducing a draft. in the ventilator duct when the ventilator is first started, or it may be used alone when only a slight draft in the duct is required.

Referring to the accompanying drawing, wherein like reference numerals indicate the same parts throughoutthc several views,

Figure 1 represents a vertical sectional 'view of the vel'ltilator, the ventilator duct being, shown leading nto the ventilator proper from. a horizontal position;

Fig. 2, a fragmentary view, partly in rear elevation and partly in section taken on line 22 of Fig. 1, showing the arrangement of the fan in the ventilator;

Fig. 3, a fragmentary. horizontal section taken on line 33 of Fig. 1, and

Fig. 4, a fragmentary sectional view, showing the ventilatorduct leading into the ventilator proper from a vertical position.

In the drawing, 1 represents the furnace or stove body proper, supported by legs 2 attached to itsbase. The body of the fun Specification of Letters Patent.

1921. Serial No. 458,418.

nace 1 encloses a combustion chamber 3 about the lower portion of which extends the usual refractory lining 4. Extending beneath the combustion chamber is an ash pit 5 having a grate 6 located just above the same. The combustion chamber is provided with a door 7 and the ash pit with a door 8, the latter .having a draft regulator 9 mounted therein.

The top wall 10 of the combustion chamber 18 provided with a circular opening 11, and an opening 12 of the same size is provided in the rear of the furnace body 1. In these openings is mounted an elbow or curved section of a ventilator duct '13, the same being supported in combustion chamber 8 from above by a flange 14 provided near the upper end of member 13. To the lower end ofmember 13 there is connected the main portion 15' of the ventilator duct which leads into the part of the mine to be ventilated. i

Above the combustion chamber 3 is a dome-shaped gas chamber 16 into which the upper end of section 13of the ventilator duct opens. This chamber is formed by two sections 17, 1.8 which are secured together by means of bolts and nuts 19 passing through ears 20 provided on the contiguous edges of the sections for this purpose. Sections 17, 18 are supported by the top wall 10 of the combustion chamber, and an upstanding flange 21 about the upper edge of the furnace body 1 serves to locate the sec tions in proper position. Sections 17, 18 are cut away at their upper edges so as to form an opening 22 for the gases passing through chamber 16. An upstanding flange 23 is provided on the sections about opening 22 over which a vertical smoke pipe 24 fits, the lower edge of the smoke pipe resting on the sections 17, 18.

111 the top Wall 10 of the combustion chamher at the rear of the ventilator and within the angle formed by the walls of the combustion chamber and the ventilator duct there is provided an outlet 25 for the products of combustion to pass from combustion chamber 3 into gas chamber 16. A channelshaped deflector 26 surrounds three sides of this opening 25 and is bolted to wall 10 through a flange. 27 provided on its lower edge. Reflector 26 with sections 17, 18 of gas chamber 16 thus form a passage-way 26' through which the 'products of combustion from chamber 3 are conducted to. the upper Patented Jan. 31, 1922. I

tion 13 of the ventilating duct so as not to interfere with the draft through the ventilator duct is a fan 28 somewhat wider than the open end of section 13 and ovalshaped so as to give it as much effective area as possible and yet allow it .to operate with out interference from the walls of chamber 16. Fan 28 is provided at one end with a stub shaft 29 journaled in a bearing 30 provided on section 18 of the gas chamber 16 for this purpose, and at the other end with a stub shaft 31 provided with a removable crank 32 extending through an opening 33 in section 18.

' 'In operation a fire is built on the grate v6 in the bottom of combustion chamber 3 whereby section 13 of the air duct and the gases therein are rapidly brought to a high temperature. A strong upward draft is thereby created through the air duct 15, section 13, gaschamber 16 and smoke pipe 24 as indicated by the arrows in Fig.1 whereby the foul air and other obnoxious gases are rapidly removed through duct 15, the outer end of which extends into any desired part of the mine. In Fig. 1, ventilation duct 15 is shown extending from a horizontal position for removing smoke and gas from the tunnel of the mine, while Fig. 4 shows a modification, wherein a ventilator duct 15' is shown extending from a vertical position for removing the air from the mine shaft.

" The products of combustion from combustion chamber 3 pass rapidly from this chamber through opening 25, passageway 26 and out to the atmosphere through smoke pipe 24 due to the draft through the combustion chamber produced by draft. regulator 9 in ash-pit door 8 and the smoke pipe 241-. It will be seen on reference to Fig. 1 that the products of combustion on their way to smoke pipe 24 are discharged from the upper end of passageway 26' at an upward angle, as indicated by the arrows, into the stream of heated'gases pasing upwardly from section 13 of the ventilator duct into smoke pipe 2 1 through chamber 16, thereby con-= siderably increasing both the upward draft in chamber 16 above the open end of the ventilator duct and ,in smoke-pipe 24. Vhile the use of fan 28 is not absolutely necessary, its operation at any time will accelerate the flow of gases through ventilator duct 13. It is particularly useful on damp days or whenever it is desired to start a current flowing quickly; and in many cases, its use alone will create all the draft necessary without building a fire in the furnace.

The ducts and passageways of the ventilator it is to be noted are formed, when ever practicable, with gradual curves so as to interfere as little as possible with the natural and rapid upward flow of the gases and the production of strong drafts where desired.

While the drawing illustrates a practical embodiment of the invention, which may be operated economically and with little personal attention it is contemplated that minor structural changes may be made without departing from the invention as defined by the appended claims.

The term up-take as used in the claims products of combustion are discharged into the passage through which the gases from the ventilator duct are passing so as to increase the draft and facilitate the ventilation of the mine.

What is claimed is I 1. The combination with a furnacestructure having a combustion chamber provided with an outlet in its upper wall, of a casing forming a gas chamber above said combustion chamber into which the products of combustion pass through said outlet, said casing being also provided with an outlet for the gases in said chamber; and a ven' tilator duct passing through said combustion chamber and discharging into the gas chamber beneath said gas outlet.

2. The combination with a furnace structure having a combustion chamber provided open end of said ventilator duct; and a smoke pipe leading froman opening into the upper part of said gas chamber above 7 the discharge end of said ventilator duct.

3. Thecombination with a furnace structure having a combustion chamber provided with an opening in its rear wall and an opening in its top wall, of a dome-shaped easing supported by said furnace and forming a gas chamber in conjunction with the gas chamber having an outlet in its top Wall in line with the discharge end of the ventilator duct.

In testimony whereof I have signed my name to this specification.

'EZEKIEL C. CONDIT. 

